# SDR AWXA200400763

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: July 11, 2004
- Submitted: July 12, 2004
- Operation: Air carrier
- Aircraft: N631AW
- Make and model: Airbus A320-231
- Registry model: [Airbus A320-231](https://openairdocs.org/model/airbus-industrie-a320-231) (OpenAirDocs)
- Aircraft serial: 077
- Aircraft time: 46,942 hours, 21,237 cycles
- System (JASC): [3350 · Emergency Lighting](https://openairdocs.org/jasc/3350)
- Part: Epsu
- Part number: 321454
- Part serial: 0728
- Condition: Faulty
- Location: Zone 241
- Part time: 7,999 hours, 3,160 cycles
- Stage of operation: IN
- How discovered: C
- Nature of condition: L
- Precautionary procedure: K
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AWXA200400763

## Discrepancy

DURING 4-DAY CHECK EMERGENCY LIGHTS WOULD NOT PASS TEST AT THE PRESS TO TEST PANEL.  MAINTENANCE REMOVED AND REPLACED THE LT OVER WING EMERGENCY POWER SUPPLY UNIT (11WL) AND BATTERY PACK;  OPERATIONAL CHECK WAS GOOD.

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